[Typhoon No. 6] Okinawa should be prepared for a typhoon by the weekend; rain and wind will intensify in northern Japan tomorrow (commentary: weather forecaster Atsuko Miyake)

2026/05/28 15:26

It looks like the rain and wind will gradually become stronger in northern Japan from now on.



First, let's take a look at tonight's forecast weather map.
A low pressure system accompanied by a front is expected to approach Hokkaido.
Also, a front other than this front and the low pressure system is expected to approach the Kanto region.



The low pressure system in Hokkaido is expected to develop in the north of Hokkaido into tomorrow.

There is some strong cold air above this low pressure system.
As a result, atmospheric conditions are likely to become unstable mainly in northern Japan.




Now, let's take a look at the rain.

I'll be watching it today, Thursday the 28th, from 3pm.
Big rain clouds are approaching northern Japan.

It is associated with fronts and low pressure systems.
Rain clouds associated with the front are expected to reach the Kanto region, and temporary rain is also expected to occur in the Kanto region.



At night, the rain will become heavier mainly in northern Japan.

Late at night, you may see yellow or green displays accompanied by thunder.
Also, there seem to be many places in northern Japan where the peak of rain occurs during the dark hours of the night.
Please be careful about how it rains.

And then, at dawn the next day, the 29th (Friday).

Big rain clouds are expected to move to the east.
Tomorrow morning, there are likely to be some areas of the Hokuriku region where there will be some lingering rain as cold air moves in.
The strong winds are expected to continue tomorrow in northern Japan. Please be careful of strong winds.



And there is a typhoon on the southern sea.

Let's take a look at typhoon information.
Information as of 9am.
Typhoon No. 6 is currently moving north-northwest over the sea east of the Philippines.
It will not develop much until tomorrow, but
the central pressure will develop to 970hPa by the day after tomorrow, and
winds are expected to strengthen and develop into a strong force.


Furthermore, on June 1st (Monday), the central pressure is expected to reach 950hPa and become even stronger.

It is expected to get very close to Okinawa from the 1st (Monday) to the 2nd (Tuesday).

The waves on the sea will be high from the weekend.

Be prepared for a typhoon by putting away items that are likely to be blown away during the weekend.




From tonight until tomorrow, rain will continue from
northern Japan and Hokuriku to the San-in area.
Especially in northern Japan, please be careful of sudden strong rain accompanied by lightning, lightning strikes, and gusts of wind.

From Kanto to Kyushu, there are many places where it will be sunny tomorrow (Friday)
There are many places where it will be a midsummer day with temperatures above 30c.

The temperature is expected to reach 32 degrees in Kochi.

Let's take proper measures against the heat.



Finally, the weekly forecast.

The Sea of Japan side of northern Japan will be cloudy and rainy in some places on the 30th (Saturday).
In Sapporo, the temperature is 18c and there is little sunlight, making it feel cool.

It looks like most other places will have sunny days on Saturdays and Sundays.
There are many midsummer days with temperatures above 30c.

It is expected to be midsummer in Tokyo until Monday.
Let's start taking serious measures against heat stroke.

[New disaster prevention weather information] What is a "danger warning" that will start sequentially from this afternoon (Commentary: Weather forecaster Atsuko Miyake)

2026/05/28 14:35

New disaster prevention weather information will be rolled out from the afternoon of today, May 28th (Thursday).
Today we will talk about danger warnings.



Heavy rain disasters occur almost every year, but the challenge every time a disaster occurs is
``not knowing when to evacuate.''



In fact, the Japan Meteorological Agency also announced various information such as heavy rain warnings, landslide warning information,
information regarding significant heavy rain.
I think it was difficult for the general public to understand which information was dangerous
.
This time, the disaster prevention weather information will change drastically from this afternoon.



This change is not about providing information, but
is a review with an emphasis on leading to action.

The biggest change this time is
this level division.
For example, regarding heavy rain. Level 1 is early warning information,


information level is heavy rain advisory, level 3 heavy rain warning, level 4 radish danger warning, level 5 heavy rain special warning. That's what it means.


The level will be included in the name, creating a sense of unity and making it easier to understand the degree of danger.



This is a list showing the alert level and actions to be taken.
At the level 2 warning level, evacuation actions are confirmed,
at the level 3 warning level, elderly people and others are evacuated from dangerous areas.


A level 4 danger alert requires everyone to evacuate from dangerous areas.


And at alert level 5, lives are in danger.
Please ensure your safety immediately.



What I would like you to especially remember this time is this level 4 danger warning. This has been newly installed


This information has been unified with the existing landslide warning information, flood risk information, etc.


information regarding the stage at which evacuation is necessary.


Level 4 means that all people in dangerous areas must evacuate.
In recent years, the risk of heavy rain disasters can increase rapidly at night.
By evacuating at night, you may end up encountering a disaster.
, so I would like Level 4 to be the level for completing evacuation, not for the start of evacuation.



However, it is important to note that this Level 4 Danger Alert may suddenly upgrade from a Level 2 Alert to a Level 4 Danger Alert.

When the rain suddenly intensifies, such as in a linear precipitation zone, the
level 3 warning may be exceeded and level 4 is reached.



If you feel that the rain is falling differently than usual,
be sure to pay close attention to your surroundings and begin preparations for evacuation, even when a Level 2 advisory is issued.

Ahead of the heavy rain season, it is a good idea to discuss in advance with your family where you will evacuate and
when you will move.

Typhoon No. 6 (Changmi) will approach Okinawa with strong force early next month

2026/05/28 07:16

Typhoon No. 6, which occurred yesterday (27th), is in the east of the Philippines as of 6:00 am today, 28th, and is moving slowly north-northwest.

#Typhoon No.6 28th (Thursday) 6:00
===================/br Center position East of the Philippines
Move North-northwest Slowly
Central pressure 1000 hPa
Maximum wind speed 18 m/s (near the center)
Maximum instantaneous wind speed 25 m/s
==================



From now on, Typhoon No. 6 is expected to continue moving northward as it continues to intensify, and is expected to be accompanied by strong winds on the 30th (Saturday). It is expected to develop into a "strong" force on the 31st (Sunday), and as the month changes, it will move south of Okinawa on the 1st (Monday), and will be closest to Okinawa around the 2nd (Saturday).

There is a risk that Okinawa will be affected by typhoons, including rough weather from the beginning of next month. Please take early typhoon measures.
Also, due to the influence of moist air around the typhoon, the front may become more active, which may affect areas far away from the typhoon. Please pay attention to the latest typhoon information.

Today's weather on the 28th (Thursday): The sky is not clear across the country. The rain and wind are gradually increasing in northern Japan.

2026/05/28 06:25

Today, the 28th (Thursday), a low pressure system and front are expected to move eastward near Japan. There will be a lot of clouds from northern Japan to western Japan, and there will be some places where it will rain. In addition, people in northern Japan should be careful of rain and strong winds starting in the afternoon.



As a low pressure system approaches, it will start raining in the afternoon in northern Japan, and in some places the rain will become heavier. In addition, the wind is strong at night, especially in coastal areas, and there is a risk of torrential rain, so if you are returning home late, please bring sturdy rain gear.
The weather in Hokuriku will gradually deteriorate in the afternoon, so please prepare rain gear when going out.

The Kanto region will receive sunshine in the morning, but will be covered in thick clouds in the afternoon. There is a possibility of rain during the day, so it's a good idea to carry a foldable umbrella.
There seems to be a possibility of rain in the Tokai region, especially in the morning.

On the Pacific side of western Japan, there will be some lingering rain mainly in the morning, but there will be places in Shikoku and southern Kyushu where the sun will return in the afternoon. On the other hand, the weather is not clear on the Sea of Japan side, and there are likely to be some places where it will rain, especially in the afternoon.

Temperatures are expected to be higher than normal nationwide, although clouds will likely spread. It can feel hot and humid during the day, so take precautions against the heat by staying hydrated frequently and choosing breathable clothing.

Typhoon No. 6 (Changmi) is expected to develop and move northward

2026/05/27 18:40

At 9:00 am on Wednesday, May 27th, a tropical cyclone developing in the Caroline Islands became
Typhoon No. 6 (Changmi).



#Typhoon No. 6 May 27th (Wednesday) 9:00
Center location: Caroline Islands
Direction and speed: west-northwest 25 km/h
Central pressure: 1000 hPa
Maximum wind speed: 18 m/s (near the center)
Maximum instantaneous wind speed 25 m/s

Typhoon No. 6 is expected to move northward into the morning of the 28th, and then move north-northeast over the next 31 days.
It is expected to become a strong force on June 1st and take a northerly course
to advance south of Okinawa.



After that, there is a possibility that the course will change to the east, so
Please pay attention to the latest typhoon information in the Honshu area.

Today, the 27th (Wednesday), there is a risk of a linear precipitation band occurring in Kagoshima Prefecture, so be careful

2026/05/27 11:17

Currently, there is a low pressure system in the East China Sea with a front that is moving eastward.
A front extending from a low pressure system is extending through southern Kyushu to the south of Japan, and there are places in southern Kyushu near the front that are experiencing extremely heavy rain accompanied by thunder.
In Sata, Minami-Osumi-machi, Kimozuki-gun, Kagoshima Prefecture, extremely heavy rain of 73.0mm was observed in the hour until 8:34.

This low pressure system will pass through Kyushu today, Wednesday night, the 27th. Atmospheric conditions are expected to become unstable in southern Kyushu and the Amami region as warm, humid air flows toward the low pressure system and front. There will be very heavy to heavy rain with localized thunderstorms.



The Japan Meteorological Agency has issued general weather information regarding heavy rain, stating that there is a possibility that a linear precipitation band will form in Kagoshima Prefecture (excluding the Amami region) and the Amami region today, and the risk of heavy rain disasters will rapidly increase.

In Kagoshima Prefecture (excluding the Amami region) and the Amami region, please be on alert for landslides from late afternoon to early evening today, the 27th.

In Kagoshima Prefecture (excluding the Amami region), there is a possibility that a linear precipitation band will continue to form into the evening of today, the 27th, and in the Amami region, until the evening of today, the 27th, and the risk of heavy rain disasters will rapidly increase.
Please pay attention to the latest disaster prevention weather information that will be announced in the future.



[Rain Forecast]
The expected rainfall per hour on the 27th is high in places
Kagoshima Prefecture (excluding the Amami region) 50mm
Amami region 50mm

From 12:00 on the 27th to 12:00 on the 28th The predicted 24-hour precipitation is high in some places,
Kagoshima Prefecture (excluding the Amami region) 80mm
Amami region 100mm
If a linear precipitation band occurs, there is a risk that the rainfall will increase locally.

The following are the regions and periods where linear precipitation bands may occur and the risk of heavy rain disasters may rapidly increase.
Kagoshima Prefecture (excluding Amami region) Towards the evening of the 27th
Amami region Towards the evening of the 27th

[Disaster prevention matters]
Strict warning: Landslides
Precautions: Flooding of low-lying land, rising river water, lightning strikes, gusts of wind

Due to the influence of fronts and low pressure, barges occur in the east of Japan [Marine summary (May 17-23, 2026)]

2026/05/27 01:33

On May 23rd, a front extending from the south of Japan to the east of Japan and the low pressure above the front strengthened the winds, causing a storm to blow over the east of Japan.
Sea surface temperatures in the Japanese waters continued to be significantly higher than normal in the central and western regions, and were up to 4 C higher on the continental side.

Below is a summary of the ocean (May 17-23, 2026).



#Pressure distribution and waves
On the 17th and 18th, a front extended south of Japan, and there was a large gradient in pressure between it and the high pressure near Japan, and waves rose south of Okinawa.
On the 19th, a low pressure system moved northward near Okinawa, causing waves to rise.
On the 20th, a low pressure system accompanied by a front moved eastward near the Yellow Sea, causing waves to rise.
On the 21st, a low pressure system in the western Japan Sea moved eastward. A front extended east to west around western and eastern Japan. Waves rose in the Sea of Japan and the southern coast of Honshu.
From the 22nd to the 23rd, the front extended from central China to the Nansei Islands to the east of Japan, and the low pressure above the front moved eastward. There was a large pressure gradient between the front and low pressure system and the high pressure system to the north, causing waves to rise in the Sea of Japan and east to south of Japan. On the 23rd, it broke out in the east of Japan.



#Sea surface temperature
Sea surface temperatures in the central and western regions of Japan continued to be significantly higher than normal in the central and western regions, and were up to 4 C higher on the continental side.
In the East China Sea, areas that were much warmer than normal expanded, and were up to 4 C warmer.
The waters near the Nansei Islands remained at normal levels, while the waters south of Japan continued to be slightly higher than normal.
The waters off the coast of the Tokai region were at normal levels, and the waters east of the Kanto region continued to be significantly higher than normal, with temperatures up to 4 C higher than normal.
The area off the coast of Sanriku, which is much lower than normal, has shrunk.
The sea off the southeastern coast of Hokkaido was lower than normal, and the waters near the Kuril Islands and the Sea of Okhotsk remained near normal.

Weather forecast for today, the 26th (Tuesday): It will gradually rain in Kyushu and Shikoku, and there will be very heavy rain in Amami.

2026/05/26 12:13

A front will extend over the southern coast of Kyushu in the afternoon of today, the 26th (Tuesday). Amami is likely to experience locally heavy rain into the evening. There is also a possibility that linear precipitation bands may occur. Rain will spread across Kyushu from around noon, and there will also be more places in Shikoku to experience rain. From the evening onwards, there is likely to be some showers in parts of inland eastern Japan.



Today, the afternoon of the 26th (Tuesday), a front is extending near Kyushu. Warm, humid air is flowing toward the front, and rain clouds and thunderclouds are developing near Amami.
Amami will experience locally heavy to very heavy rain into the evening. Until the afternoon, there is a risk that a linear precipitation band will form and the risk of heavy rain disasters will increase rapidly.



Rain will gradually spread in Kyushu from around noon. It will rain in Shikoku from the evening onwards, and rain gear will be needed in many parts of the country at night.
It will be sunny in many parts of Honshu, but from the evening onwards there will be some showers in inland areas of eastern Japan. In addition, there is a possibility of light rain in parts of northern Hokkaido at night.


The maximum temperature is expected to be above normal in many places today. Temperatures are expected to be around 28 degrees Celsius widely in the Kanto region and west, with midsummer days expected to reach 30 degrees Celsius or higher in some places, mainly in western Japan. In Tohoku, there are places inland where the temperature approaches 30c, and in Hokkaido, there are places in the northern part and the Sea of Okhotsk where the temperature exceeds 25c. Please take precautions against the heat, such as hydrating frequently.

A typhoon egg lies in the sea far south of Japan. Will a new typhoon occur in the future

2026/05/26 08:09

A cluster of clouds can be seen gathering over the ocean near the Caroline Islands, far south of Japan. This cloud mass is analyzed as an L mark (low pressure area) on the Asia-Pacific region weather map as of 3 a.m. today, but there is a possibility that it will develop into a tropical cyclone by tonight.





Looking at the forecast after that, the forecast map at 9pm on the 27th shows that it is predicted to be a typhoon. Sea surface temperatures in this area are high enough for tropical cyclones or typhoons to develop, and they are expected to continue to develop.



Looking at the weather map for the coming week, a "low" mark can be seen over the sea south of Japan from around the 30th (Saturday). It is expected to gradually move northward, and may approach Japan from the end of May to the beginning of June.

As of 8 a.m. today, the 26th, no typhoon information has been announced yet, but depending on future forecasts, it could have a major impact on the weather around Japan. Please pay attention to the latest information that will be updated in the future.

Weekly weather: Widespread rain due to fronts and low pressure; watch out for new typhoons in the future

2026/05/26 07:18

From now on, there will be widespread rain and strong winds in some places due to the influence of fronts and low pressure systems. Additionally, it is expected that another typhoon will form in the ocean far south of Japan.



Tomorrow, the 27th (Wednesday), there will be widespread rain mainly in western Japan due to the influence of a low pressure system and front moving from the west. As warm, humid air flows toward the low pressure system and front, atmospheric conditions will become extremely unstable, and there is a risk of warning-level heavy rain in southern Kyushu into the 28th (Wednesday). Please pay attention to the direction of the rain and be careful of landslides, flooding of low-lying areas, and rising river waters.

A new low pressure system is expected to form in the Sea of Japan on the 28th (Wednesday). The rain has spread to eastern and northern Japan, and there is a possibility of stormy weather in northern Japan on Friday the 29th due to stronger winds around the low pressure system. In addition to the increasing rain, please be careful of strong winds and high waves.

On the 30th (Saturday), the area around Honshu will be covered by a belt-shaped high pressure system, and many places will be sunny. It will be hot and humid in many places, with midsummer days exceeding 30 degrees Celsius. Depending on the location, there may be extremely hot days with temperatures exceeding 35 degrees Celsius. Please take proper measures against the heat to avoid heat stroke.

There is a possibility that a new typhoon will form in the sea far south of Japan by around 21:00 on the 27th (Wednesday). It is expected to gradually move northward, and could have a major impact on the weather around Honshu from the end of the month to the beginning of June.
No typhoon information has been announced at this time, but please pay attention to future information.